Patent AU-2018349940-B2 (AU)
Title: System and method for information protection
Inventor: ZHANG WENBIN
IPC: G06F21/00
Filed: 2018-12-29
Granted: 2020-08-20
Abstract: INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) 
(19) World Intellectual Property 
(1) Organization11111111111111111111111I1111111111111i1111liiiii 
International Bureau (10) International Publication Number 
(43) International Publication Date W O 2019/072313 A2 
18 April 2019 (18.04.2019) W IPO I PCT 
(51) International Patent Classification: Wah Building, No. 9 Shangdi 3rd Street, Haidian District, 
Not classified Beijing 100085 (CN).  
(21) International Application Number: (81) Designated States (unless otherwise indicated, for every 
PCT/CN2018/125749 kind ofnational protection available): AE, AG, AL, AM, 
(22)InternationalFilingDate: AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, 
(2 Intenatona Fi Date:2.2018) CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, 
29December2018(29.12.2018) DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, 
(25) Filing Language: English HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, 
KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, 
(26)PublicationLanguage: English MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, 
(71) Applicant: ALIBABA GROUP HOLDING LIMITED OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, 
[-/CN]; Fourth Floor, One Capital Place, P.O. Box 847, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, 
George Town, Grand Cayman (KY). TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW.  
(72) Inventors: ZHANG, Wenbin; Alibaba Group Legal De- (84) Designated States (unless otherwise indicated, for every 
partment 5/F, Building 3, No. 969 West Wen Yi Road, kind of regional protection available): ARIPO (BW, GH, 
Yuhang District, Hangzhou, Zhejiang 311121 (CN). LI, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, 
Lichun; Alibaba Group Legal Department 5/F, Building 3, UG, ZM, ZW), Eurasian (AM, AZ, BY, KG, KZ, RU, TJ, 
No. 969 West Wen Yi Road, Yuhang District, Hangzhou, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, 
Zhejiang 311121 (CN). MA, Baoli; Alibaba Group Legal EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, 
Department 5/F, Building 3, No. 969 West Wen Yi Road, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, 
Yuhang District, Hangzhou, Zhejiang 311121 (CN). TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, 
KM, ML, MR, NE, SN, TD, TG).  
(74) Agent: BEIJING BESTIPR INTELLECTUAL PROP
ERTY LAW CORPORATION; Room 409, Tower B, Ka 
(54) Title: SYSTEM AND METHOD FOR INFORMATION PROTECTION 
(57) Abstract: A computer-implemented information protection method comprises: 
Taining aplunileueryp ransactionmon a obtaining a plurality of encrypted transaction amounts associated with transactions 
w aith ransactons among apluiraity of, ounwherei among a plurality of accounts, wherein each of the encrypted transaction amounts is as
e.ecf tth7ell"2222;i' sociated with one of the accounts that sends or receives one of the transaction amounts, 
- mnouts. and ttlteiprinnofach ofithetmr aaionan-unt at and the encryption of each of the transaction amounts at least conceals whether the one 1t-,hxthc, thco- accoml -d,rcccthcon 
eenhu ~tracnson nmounts account sends or receives the one of the transaction amounts; generating a sum proof 
4 based on the obtained encrypted transaction amounts, the sum proof at least indicating 
that the transaction amounts are balanced; and transmitting the encrypted transaction 
obtiing e p eti velyfortacounts amounts and the sum proof to one or more nodes on a blockchain network for the nodes 
nvolve d in the transactions, the rang pmof at least inicatin 
that each o the accunts that sends the transaction-aonts ha, to verify the transactions.  
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W O 2019/072313 A21111I|III|||||I|I|||1|11 ||||I|||I||IDII ||||||||||||||||||||||||||||||| 
Published: 
- upon request of the applicant, before the expiration of the 
time limit referred to in Article 21(2)(a) 
- without international search report and to be republished 
upon receipt of that report (Rule 48.2(g))